摘要
本文对D≤4,R≥0的Abell团样品和整个R≥3的Abell团样品的空间两点相关函数做了统计分析,结果表明R≥0,R=0和R≥3的Abell团的相关函数分别为175r^(-1.8),150r^(-1.8)和1900r^(-1.8)利用已有的R≥1和R≥2团的相关函数的统计结果,我们得到了Abell团的相关性幅度α与富度N之间的关系:α∝N^(1.6)。在相关性幅度的统计误差所允许的范围内,α与N之间的关系可以在宇宙弦理论中得到解释。
In this paper, we estimate the two-point spatial correlation functions for Abell clusters with distance class D≥4 and richness R≥0,and for those with R≥3. We find that the correlation functions of Abell clusters with R≥0,R = 0 and R≥3 eaa be represented by 175 r-1.8, 150r-1.8 and 1900r-1.8 respectively. Combining the previous statistical results of the correlation functions, of Abell clusters with R≥1 and R≥2, we obtain a relation a≥N1.6 between the corf elation amplotidetude a and the richness N of the clusters. Within the statistical uncertainties of the correlation amplitudes,the α-N relation can be explained well in the cosmic string model.
关键词
星系
成团
宇宙学
Cosmology-Galaxies: clustering of
